PETSc Error 11 while running demo_poisson

dolfinx
1

I have installed fenicsx 0.9.0 on my MacBook Pro M4 recently and tried to run the Poisson Demo. However, I get the following error:

[0]PETSC ERROR: Caught signal number 11 SEGV: Segmentation Violation

The demo is not edited and the error occurs at the following line in demo_poisson.py:

problem = LinearProblem(a, L, bcs=[bc], petsc_options={"ksp_type": "preonly", "pc_type": "lu"})

I can supply all of the error message if it is needed.

Best,

2

Could you try to modify

to
LinearProblem(a, L, bcs=[bc], petsc_options={"ksp_type": "preonly", "pc_type": "lu", "pc_factor_mat_solver_type": "mumps", "ksp_error_if_not_converged": True })

Additionally, it would be helpful to know how you installed dolfinx.

3

I modified it and it resulted with the same error message.

I initially installed DOLFINx from source without PETSc, and it worked without any issues. Later, I installed PETSc via Homebrew and petsc4py via pip, then reinstalled DOLFINx from the source. After that, I encountered this error.

4

Did you make sure to clear your old dolfinx include files fully?

Also, if the dolfinx code above when you did not have PETSC installed, you must have had a PETSC installation somewhere else, as LinearProblem relies on PETSC and petsc4py.